If you just want to **** yourself stupid then sure bar girls are the way to go... if your looking for someone you can converse with (and maybee build something more than 'I pay bar now' type conversation) then educated girls online can be a fun game but its not for the tourists more the longer termers..
Fun to be had with bangkokchat or thailandfriends or even (if you travel) vietfun all .com IIRC...
Had some fun BKK hookups with TF's that were not only intelligent but free and keen.. not so many memebrs down here on Phuket tho..